Its analgesic effects are only partially reversed by naloxone, hence indicating that its opioid action is unlikely the sole factor; tramadol's analgesic effects are also partially reversed by Î±2 adrenergic receptor antagonists like yohimbine and the 5-HT3 receptor antagonist, ondansetron.
Array formulas in versions before Excel 2007 cannot handle whole-column references. In Excel 2007, array formulas can handle whole-column references, but this forces calculation for all the cells in the column, including empty cells. This can be slow to calculate, especially for 1 million rows.
None of the arrays in the excel LOOKUP & SEARCH formulas given use array formula's, just arrays. However ... the only way I was able to get SEARCH to work in Calc with an array was by using an array formula (which I didn't find documented), which would not work for the formula (again, I could be wrong).